Flight number record
DL 1342
Delta Air Lines · Salt Lake City to Sacramento
- Route
- SLC → SMF
- Departs
- 15:20
- Flights
- 347
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1342, check with Delta Air Lines.
DL 1342 lands a B, 5 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 347 flights, with a median arrival 6 minutes early.
Set against the rest of the country, DL 1342's record is 5 points better than the US average of 77.3%. That gap is worth roughly 45 fewer late arrivals for every thousand flights.
Key figures
On time
81.8%
Arrivals under 15 minutes late, of 341 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.73%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 347 flights between September 2025 and August 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1342 flies
DL 1342 flies SLC to SMF without a single fixed slot. Its most common scheduled departure was 15:20, used on 86 of 347 flights, with 15:25 (59 flights) and 15:30 (53 flights) next.
- Departs 15:2086 flights24.8%
- Departs 15:2559 flights17.0%
- Departs 15:3053 flights15.3%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 15:20 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1342 runs 10 points better at 81.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1342 next to SLC to SMF
Every carrier on SLC to SMF combined arrived on time 84.8% of the time across 2,165 flights, so DL 1342 is 3 points behind it. Delta flew 1,503 flights on the same city pair under all its flight numbers, including this one, and those ran 86.4% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1342thin sample | 347 | 81.8% | 66 min | 1.73% | B |
| All Delta Air Lines on SLC–SMF | 1,503 | 86.4% | 66 min | 1.20% | A |
| All carriers on SLC–SMF | 2,165 | 84.8% | 63 min | 0.92% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1342 quarter by quarter
DL 1342 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 72.1%, a swing of 21 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202579 flights79.5%
- Jan–Mar 202685 flights81.7%
- Apr–Jun 202691 flights86.7%
- Jul–Sep 202662 flights72.1%
Scale runs 65% to 100%.
By weekday, DL 1342 ranged from 77.6% on Wednesday to 89.4% on Saturday. With about 50 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1342 runs when it is late
The 62 late arrivals split 19 under half an hour, 16 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early74 flights21.7%
- Within 15 min205 flights60.1%
- 15–29 min late19 flights5.6%
- 30–59 min late16 flights4.7%
- 1–2 hours late21 flights6.2%
- 2+ hours late6 flights1.8%
Scale runs 0% to 100%.
Share of 341 completed flights by arrival against schedule.
16 of 71 late departures made up the time and arrived on time, 23% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for DL 1342
The latest arrival of the period was on 10 January 2026, 4 hours 26 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 January 2026 | 4 hours 26 minutes | Carrier |
| 11 August 2026 | 4 hours 6 minutes | Carrier |
| 21 November 2025 | 3 hours 18 minutes | Late-arriving aircraft |
| 23 June 2026 | 3 hours 17 minutes | Carrier |
| 14 December 2025 | 2 hours 55 minutes | Carrier |
Delay causes
Why DL 1342 runs late
Carrier accounts for 63% of the 4,077 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 29%Late-arriving aircraft
- 8%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,551 of the 4,077 delay minutes reported here. The split is drawn from 4,077 delay minutes reported on DL 1342.
Cancellations sit at 1.73% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 532 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
DL 1342 is not only a SLC to SMF flight. It also flew SMF to SLC (347 flights, 82.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 347 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SMF to SLCthin sample | 347 | 82.6% | 79 min | 2.02% | B |
What to do with this
Booking DL 1342
For a booking, read DL 1342 as 81.8% on time with 1.73% cancelled over 347 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to SMF, every carrier and departure
- SMF to SLC, the return direction
- Delta Air Lines 1423 on the same route85.2%
- Delta Air Lines 1582 on the same route89.0%
- Delta Air Lines 1367 on the same route92.6%
- Salt Lake City International (SLC) delay statistics
- Sacramento International (SMF) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.